Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions

Abstract

This paper investigates the electromagnetic production of lepton pairs with low transverse momentum in relativistic heavy ion collisions. We estimate the initial photons' transverse momentum contributions by employing models where the average transverse momentum squared of the incoming photon can be calculated in the equivalent photon approximation. We further derive an all order QED resummation for the soft photon radiation, which gives an excellent description of the ATLAS data in ultra-peripheral collisions at the LHC. For peripheral and central collisions, additional $p_T$-broadening effects from multiple interaction with the medium and the magnetic field contributions from the quark-gluon plasma are also discussed.

21 pages, 13 figures; added more discussions on the generalized equivalent photon approximation and 3 new figures

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• The $\cos 2\varphi$ azimuthal asymmetry in ${\rho }^0$ meson production in ultraperipheral heavy ion collisions
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• Report on Progress in Physics: Observation of the Breit-Wheeler Process and Vacuum Birefringence in Heavy-Ion Collisions
• Inclusive prompt photon-jet correlations as a probe of gluon saturation in electron-nucleus scattering at small $x$
• Lepton pair photoproduction in peripheral relativistic heavy-ion collisions
• Probing the gluon tomography in photoproduction of di-pions
• Energy Dependence of the Breit-Wheeler process in Heavy-Ion Collisions and its Application to Nuclear Charge Radius Measurements
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• Azimuthal asymmetries of muon pair production in ultraperipheral heavy ion collisions
• Exciting Ions: a Systematic Treatment of Ultraperipheral Heavy Ion Collisions with Nuclear Breakup
• Coulomb nuclear interference effect in dipion production in ultraperipheral heavy ion collisions
• Measurement of muon pairs produced via $\gamma \gamma$ scattering in non-ultraperipheral Pb+Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=5.02$ TeV with the ATLAS detector
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• Electromagnetic interaction of low transverse momentum electrons and positrons with heavy nuclei in ultra-peripheral ultra-relativistic heavy-ion collisions
• Probing Quantum Phenomena through Photoproduction in Relativistic Heavy-Ion Collisions
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• Nuclear deformation effects in photoproduction of $\rho$ mesons in ultraperipheral isobaric collisions
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• Feasibility of tau g-2 measurements in ultra-peripheral collisions of heavy ions
• Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs
• Linearly Polarized Photon Fusion as a Precision Probe of the Tau Lepton Dipole Moments at Lepton Colliders
• Upcgen: a Monte Carlo simulation program for dilepton pair production in ultra-peripheral collisions of heavy ions